CVE intelligence and bounded remediation
CVE-2016-6424 — Cisco Adaptive Security Appliance Software security vulnerability
Medium
CVSS 6.5
The DHCP Relay implementation in Cisco Adaptive Security Appliance (ASA) Software 8.4.7.29 and 9.1.7.4 allows remote attackers to cause a denial of service (interface wedge) via a crafted rate of DHCP packet transmission, aka Bug ID CSCuy66942.
- Severity
- Medium
- CVSS
- 6.5 (3.0)
- Published
- 2016-10-06
- CISA KEV
- Not currently listed
- Ecosystem
- operating-system
- Weaknesses
- CWE-399
Affected products
- cisco / adaptive_security_appliance_software / 8.4.7.29
- cisco / adaptive_security_appliance_software / 9.1(7)4
Matched remediation archetype
Resource exhaustion and denial of service
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
- Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
- Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.
Remediate safely
- Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
- Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
- Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.
Authoritative sources
Complete CVE record and remediation plan
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